#Softraid linux install#
#Softraid linux update#

Remember to update /etc/mdadm/nf (remove md0).Īnd save config to initramfs (to be available after reboot) update-initramfs -u mdadm -stop /dev/md0Īnd again - wait until recovery on md1 is finished. Be absolutely sure everything is working. IF IT WORKED CORRECTLY Destroy old array and add the remaining disk to the new array.Īt this point you will destroy data on the last member of the old md0 array. Some Linux rescue/boot CD works best.Ħ) Boot on new array.

#Softraid linux install#

To check status use one of below commands: # status of sync/recoveryĥ) Install GRUB on the new Array (Assuming you're booting from it). The md0 should still be usable but only if the other raid member was fully operational.Īlso note that this will begin syncing/recovery processes on md1. (this is only an example command, read the man pages for rsync) rsync -arHx / /where/ever/you/mounted/the/RAID10Ĥ) Fail 1st part of the old RAID1 (md0), and add it to the new RAID10 (md1) mdadm /dev/md0 -fail /dev/sda2 -remove /dev/sda2 rsync to copy data from old RAID 1 to the new RAID 10. The /dev/md1 should be immediately usable, but need to be formatted and then mounted.ģ) Copy files. # Save config to initramfs (to be available after reboot)Ģ) Format and mount. Mdadm -detail -scan | grep '/dev/md1' | tee -a /etc/mdadm/nf # Add new layout (grep is to make sure you don't re-add md0): Note! You should save the layout of the array: # View current mdadm config: To view layout and other details of created array use: mdadm -D /dev/md1 Your data on md1 is not safe at this point (effectively it is RAID0 until you add missing members). Note that in this example layout sda1 has a missing counterpart and sdb2 has another missing counterpart. lsblk to view your current layout.Ġ) Backup, Backup, Backup, Backup oh and BACKUPġ) Create the new array (4 devices: 2 existing, 2 missing): mdadm -v -create /dev/md1 -level=raid10 -raid-devices=4 /dev/sda1 missing /dev/sdb2 missing sda2 and sdc1 are old partitions (with crucial data).

sda1 and sdb2 are new, empty partitions (without data).md1 is the new array of type/level RAID10.md0 is the old array of type/level RAID1.With linux softraid you can make a RAID 10 array with only two disks.